What does it mean by LOS (line of sight)?
LOS refers to the distance between the video/audio transmitter and the receiver in open space (line of sight). If there are walls, partitions or other obstacles between the transmitter and the receiver, the effective transmission distance will be much much shorter. The effective transmission distance for clear video/audio signals depends on the structure of the walls, partitions or the obstacles between the transmitter and the receiver. For example, a steel-embedded wall will shorten the effective distance more than a wooden wall. In order to improve signal reception, try to place the transmitter with its antenna upright and put it in a higher position than the receiver whenever possible. Or put the transmitter in different locations to get the best video result.
